Abstract
A novel omni-directional Ultra-Wide Band (UWB) biconical antenna with band-notched is described. Firstly, the biconical antenna in the shape of two kinds of bicone placed above a flat ground plane is designed. The antenna operates from 2.4–20 GHz with low Voltage Standing Wave Ratio (VSWR<2), excluding a band-notched frequency at 5–7GHz. Then in order to improve the structure of the ground plane for miniaturization without degrading the VSWR, ground plane shaping is introduced leading to an antenna that operates from 2.4–20 GHz with low VSWR (<2) too. The biconical antenna is fed by a coaxial probe through a SMA connector. The length of the proposed biconical element above the ground plane is slightly less than λ /4 at the lowest frequency in the band. Simulation results for VSWR and radiation pattern of the three antennas are presented and discussed.
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